Polyhydroxybutadiene and amine terminated polybutadiene blends

Abstract

Compositions comprising blends of polyhydroxybutadiene homopolymers and amine terminated polybutadienes useful for the preparation of polyurea and/or polyurethane elastomers, sealants, coatings and binders are disclosed as well as a process for the preparation of the polyurea/polyurethanes.

I claim: 
     
       1. A composition useful for the preparation of polyurea and/or polyurethane elastomers, sealants, coatings and binders which comprises a blend of (a) about 2 to about 98 parts by weight, based on the total weight of the composition, of a polyhydroxybutadiene homopolymer having the formula ##STR4##  wherein n is an integer of from about 5 to about 1500, and (b) about 98 to about 2 parts by weight based on the total weight of the composition of an amine terminated polybutadiene having the formula ##STR5##  wherein R is hydrogen, a straight or branched chain alkyl group containing from 1 to 10 carbon atoms or a substituted or unsubstituted aryl or aralkyl group containing one or more benzenoid rings which may be fused or joined by single valency bonds and n is an integer of from about 5 to about 1500.   
     
     
       2. A composition according to claim 1 wherein the amine terminated polybutadiene is a cyclohexylamine terminated polybutadiene. 
     
     
       3. A composition according to claim 1 wherein the amine terminated polybutadiene is a phenylamine terminated polybutadiene. 
     
     
       4. A composition according to claim 1 wherein the amine terminated polybutadiene is an n-butylamine terminated polybutadiene. 
     
     
       5. A process for the preparation of a polyurea and/or polyurethane which comprises reacting from about 10 to about 50 parts by weight, based on the total reaction mixture, an organic di- or polyisocyanate at a temperature of from about 0° C. to about 50° C., with a composition which comprises a blend of (a) from about 2 to about 98 parts by weight, based on the total weight of the composition, of a polyhydroxybutadiene homopolymer having the formula ##STR6##  wherein n is an integer of from about 5 to about 1500, and (b) from about 98 to about 2 parts by weight, based on the total weight of the composition, of an amine terminated polybutadiene having the formula: ##STR7##  wherein R is hydrogen, a straight or branched chain alkyl group containing from 1 to 10 carbon atoms or a substituted or unsubstituted aryl or aralkyl group containing one or more benzenoid rings which may be fused or joined by single valency bonds and n is an integer of from about 5 to about 1500.   
     
     
       6. A process according to claim 5 wherein the reaction is carried out at a temperature of from about 25° C. to about 35° C. 
     
     
       7. A process according to claim 5 wherein diphenylmethane diisocyanate is employed in the reaction. 
     
     
       8. A process according to claim 5 wherein the amine terminated polybutadiene is a cyclohexylamine terminated polybutadiene. 
     
     
       9. A process according to claim 5 wherein the amine terminated polybutadiene is a phenylamine terminated polybutadiene. 
     
     
       10. A process according to claim 5 wherein the amine terminated polybutadienne is an n-butylamine terminated polybutadiene. 
     
     
       11. A process according to claim 5 wherein from about 15 to about 25 parts by weight of di- or polyisocyanate is employed.